Process of plating metallic bodies.



v UNITED sr 'rEs PATENT oFFIoE.-

No; 900,847. 1 Specification 01' Letters Patent. Patented Oct. 13, 1908. Application filed March 28, 1906. Serial No. 308,446.

To all whom it may concern: then submerge the body to be plated in a Beit known that I, GEORGE A. GooDsoN, molten bath of the plating metal,this suba subject of the King of Great Britain, resid .mergence beingobtained either by dipping ing at Minneapolis, Hennepin coun'ty, Min-(as in the case of plates and the like) or, 60

p Where wire is to be plated, by causing the fa mprovements in Processesof. Plating wire to traverse or to be drawn through the Metallic Bodies;and I do hereby declarethemolten bath, as, for instance, by the apafollowing tobe a full, clear, and exact deratus shown in my patentabove referre to, scrlption of the invention, such as will enable orinmy patent, N 0. 789,691, of even date 65 10 others skilled in the art towhich it appertherewith. i to tains to make and use the same. Astillmore convenient way of practicing In Letters Patent of the UnitedStates the invention is by the employment of appa granted to meunder'date of May 9, 1905, N o. ratus wherein the plating metal is firstsub- 78 9,690 I have describeda process of galvanjected to the'influenceof the electric current, 70

lzlng, tlnnlng, or otherwlse lating wire and w la in a molten condition,and is transtlon having been filed November 24, 1905,

as the coating metal a firmly adhering non time is adapted for thesuccessfi l coating of electric current may e permitted to cool lating,which is still much better than I lary discoveries; 5

0t er metallic bodies. T e fundamental ferred to a second vessel orreceptacle where-- 'feature' of the process described in my said in itis keptin a molten condition by a patent, and which I have claimed in anapflame, furnace fire, or the like, this second plication for a reissuethereof, said applicareceptacle serving as the plating or coating vesselproper, 'i. e. as a dipping rece tacle for plates, or as a receptacle trough w ich wire and the like maybe drawn.

The second vessel referred to may be of any suitable kind. In our actualpractice, it was a large coal heated melting pot, adapted to old severaltens of lati-ng metal and fitted for thedipping and andlmg, of sheetmetal plates in the; well known standard resultant eflect that evenwhenlead is used -scallng coating thereof is obtained upon the metal tobe plated. In the said reissue application, I have claimed this featurebroadly.

, simply the; fact that the'plating' metal: had

rst een energized y treating the same with the electric current inthe-electric cner'-- gizing furnace, in the way and for the timehereinafter more partlcularly stated.

ferred to, I have ascertained that the plating metal after it has beenonce subjected tothe actionof an electric current of the proper to-theinfluence of the electric current, in the manner referred to, thedplatingmetal thustreated may be permitte to cool down, and

stance, into ingots. This partly solidified, solidified, or ingot metal,may then be brought to the molten condition, either by the electriccurrent itself, or by a gas flame,

a furnace fire, orother source of heat indeiavebeen' ableto secure withlatingmetal ound that the remeltedmetalwill effectively which has neverbeen ubjecte to the action coat'the metal to-bejplated, although no'el'ecof an electric currentz' It is'the' urpose of tric current ispassed through the plating my present specificationito cover tliceed'ing. 1 v

In carr ing my present invention into 'Broadly stated, therefore,the-discovery practice, fbr the plating'ofmetallic bodies, underlyingmypresent invention-,is that the such as, for instance,wire orplates-ofiron' or plating metal isi'availablefor the successful 'steel,Ifirst subject the bodies to be coated, coating of the metallic body tobe plated, 11!

55 to the usual pickling operations for the reeven though no electriccurrent ispassed moval of the surface oxidation or scale. I through-theplating metal during thefprogway. The differencein our practice was 85even to'sohdify 1I1t0 a. solid mass, as, forin- 95 ese-ancilmetal whilethe coating .operation is pro 2 Y Y cease-7 ress of the platingoperation, provided only may thereafter be remelted, as above specithatthe plating metal has. previously been fied, is a current of about 1,500to 2000 amsubjected to the action of a suitable electric peres, ap liedto a body of the molten metal 65 current for asuitable period of time.The time 1 of say an inch in diameter, which current required to get theplating metal into the l may be readily derived from the secondary bestcondition varies somewhat, according circuit of a suitably proportionedtransto the kind of metal employed, and for other former. causes, butfor commercia lead, or an alloy It will, of course, be understood thatin the of lead and antimony (87% lead and 13% alloy of lead andantimony, the antimony 10 antimony), is usually about fifteen hoursplays the part of a hardening agent. It is with the use of an energizingfurnace subpresent usually in the proportion of about stantially of thekind disclosed in my patent 13% and in such proportion it is found not789,215 of May 9th, 1905, hereinbefore reto interfere with the properadherence of the ferred to, with electrical connections adapted lead tothe metallic body to be plated.

15 .to afford a current of about 1300 amperes in l What I claim anddesire to secure by Letthe tube connecting the melting pots. The tersPatent of the United States, is:- tube in the ap aratus actually usedhad a 1. The process of plating metallic bodies cross section 0 oneinch-external diameter which. consists in sub ecting plating metal toand three-fourths inch internal diameter or an electric current while ina molten condi- 20 bore; and the metal was kept flowing from,tion,discontinuing the passage of the current,

i one metal pot to the other. More specificand thereafter applying thelating metal to ally, my resent invention is intended to the metallicbody to be plates. cover the rther discovery that the plating 2-. Theprocess of plating metallic bodies, metal may be made available for theproducwhich consists in sub ecting plating metal to r 25 tion of thesame result, provided it has been an electric current w 'le in a moltencondisubjected to the action of a suitable current tion, allowing thesaidplating metal to solidof electricity for a suitable period of time,

ify, and subse uently remeltmg said plating even thou h the platingmetal thus treated metal and a p ying the same to the metallic may haveeen permitted to cool down so as .body to be p ated. 30 to solidify,thereby requirin to be remelted 3. The process of plating metallicbodies, before it 15 em loyed in the p ating or coating which consistsin subjecting lead to an elec operation. ese discoveries are of materialtric current while in a molten condition, alimportance from thestandpoint of the conlowing the lead to solidify, subsequently revenientand economical practice of the gemelting said lead and apply' g it tothe me- 35 neric invention. For instance, where a comtallic body to beplated.

paratively large body of plating metal is re- 4. As a new article ofmanufacture, a mequired, 'i. e. as in. receptacles for dipping I tallicbody plated with a metal which has large plates, .it would be bothinconvement an been previously subjected to an electric curv expensiveto effective? subect the enrent while in molten condition. 4:0 tlre bo yof metal require for t e purpose, 5. As a new article of manufacture, ameto the action of an electric current sufiicient tallic body platedwith lead which has been to bring it all to the required condition in apreviously subjected to an electric current sin 1e vessel. It is,therefore, preferable to while in molten condition. ma e up the contentsof such a dipping ves- 6. As a new article of manufacture, a body 45 seleither by melting therein, by an ordinary of platin metal which has beensubjected to gas fire or the like, a suflicient number of inan electriccurrent while in molten condition gots which have already been subjectedto and allowed to solidify, whereby it has imthe action of theelectriccurrent, and which parted to it the uality of forming an intimay comefrom some distant source of supmate union with the metal to be coated,

5-0 ply, or even where electric curre t is ava1l- 7. As a new article ofmanufacture, a body able at the placewhere the platin is to be of leadfor use in plating metals which has carried on, it is more economical toring the been subjected to'an electric current while in plating metal tothe required condition, in a molten condition and allowed to solidify,separate or smaller tube, conduit, or other whereby it has imparted toit the quality of 55 receptacle, wherein smaller bodies of the formingan intimate union with the metal to metal may be successively brought tothe debe coated. siredcondition. v In testimony whereof I affix mysignature,

In the'practice of my invention, 1 find that j in presence of twowitnesses. a suitable current for bringin the plating GEORGE A. GOODSON.

60 metal, as, for instance, lead, or Toad and anti- Witnesses.

mony, to the proper condition for effective J. E. HU'ronINsoN, Jr.,plating, orfor the casting f ingots which-l THOMAS Hows.

